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Acne Vulgaris

definition

Chronic inflammatory disease of the pilosebaceous units characterized by the formation of comedones, erythematous papules and pustules, less frequently nodules or cysts and, in some cases, scarring. Several factors are involved in the pathogenesis: inheritance, increased sebum production, an abnormality of the microbial flora, cornification of the pilosebaceous duct and the production of inflammation.